Heat Shield (4L80-E): Removal
WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, and 2002 GMC C3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Raise the vehicle. Remove the 2 bolts securing the transmission heat shield to the cross member. Remove the transmission heat shield from the cross member. See Figure.